Search results for query: *

Thanks a lot for your time,

HI, I have ask for a cabinet to control on start, stop, alarms of a standby set, 3000 kva, according to nema standards, friday, i cheek the wirings and saw there´s no alarms on pt100´s of the winding of generator, for me here in Europe, the normal situation in this size of genset is to have...

hi I used to do on this way with a decs 200 but it´s same for other units, , and about the control, the plc control the moment flashing goes on and the time its on, all the time in paralell operation with the decs 200, and for others avr, you need to control voltage rise and switch off...

hi, thanks dpc, i tried on caterpillar web and i found a lot info about scavengers, etc, that i thought maybe someone on the forum know the right adress, thanks to everybody for help and i´m going to try this software

thanks again waross, your reply is very nice, do you know exactly or a a link to the catterpiller web where i could see this calculation program, but it´s seen that i use a big generator cause mine is 4000 kva, and the motor is no so big... i need maybe 100kw more on power to achieve the rule of...

thanks, but i would like, just now i´m asking, if somebody could to make a quick calculation on my numbers and see if i could start the pumps or no... comparing with a normal diesel motor and pmg generator or boost generator, cause i oversized generator for the run load, about 49% of rates...

Better to oversize the prime mover- waross said Why you want to oversize prime mover, on starting the kw demand as the pf is low is not high, in the numbers i put from the test banch of the motors, they are water pumps, and i wonder if i could have same issue with this values of starting...

is there any tool on internet for doing it? thanks

Ok, seems to be, that in any way, nobody hear nothing about that relation between number of poles of motor and generator, for me seems to be no sense, but i´m not a expert. And about my calculations, if the generator can give 300% of the nominal kva during 10 seconds, we could think no big dip...

of course, generator is 60 hz and motors also, but i wonder about what this guys are talking about.... cause when i don´t understand never think about others fault.

Trying to start 4 motor 330kw and two motors of165 kw, on direct start Mechanical output 330 kw Volts 4160 V current nominal 68 A pf 0,72 eficiency 0,9 start current 243 A starting torque 0,94 pf on starting 0,1. the other motor dates are mechanical output 165 kw, volts 4160 V, currento full...

i agree with catserver, and if you test all the points, something is wrong on generator repair, i mean that when they dismounted rotor for rewinding maybe they hit it or something get injured, and the same as diodes, if there´s a problem on stator as short circuit, is posible diodes get injured...

no i connect directly a device to measure the resistence, have somebody some literature about this concept... and about that pt 10 ohms with lower impedance??? Now the ship is sailing.. but i want to think about

and i just thinking, if generator was rewound, the avr is the same that was working with the generator, and it have to work perfectly, Maybe the generator come with a problem from the repair shop? maybe on the rotor? About the diodes, if you rewound generator, maybe you have dameges diodes...

"BTW, thanks everyone for your valued tips/suggestions. My conclusion is that the AVR malfunctioned and killed the rotor" No, i don´t think so, i´ll share with you a document about a bad synchonization... and the process, my experience tells me that in a loss of excitation, you have to be...

no they are not twisted and come from inside of generator with no twisted connection, but the influence is on cable or maybe on the pt100 sensor?? i don´t understand, and normally the cable from pt100 sensor is not twisted anymore

hi, if i read directly on rtd the value isn´t stable when you over 50% load, and this is why a think about harmonics or something like that cause the noise increase when you start propulsion motors.

this is pt100 sensor, and if they´re into the slot, into hot spot, i think they must support such magnetic force without distortion.... and the most important thing, how to solve? cause i can´t install a new sonda onto a wind, is it dependent on harmonics or just about magnetic field. thanks

yes, the problem is still if you measure directly on the pt100 connectors on generator.

I have two generators 1,5 mw on a vessel, and they´re are used to supply the generation plant for the vessel and two syncronous motor used for propulsion, the level on harmonics on voltage is not to big, ok, the problem is that with more than 50% of the load, the signal that comes from pt100...